Abstract：
Purpose:To develop and use a custom virtual fields method (VFM) to assess the biomechanical properties of human prelamina and lamina cribrosa (LC) in vivo. Methods:Clinical data of 20 healthy, 20 ocular hypertensive (OHT), 20 primary open-angle glaucoma, and 16 primary angle-closure glaucoma eyes were analyzed. For each eye, the intraocular pressure (IOP) and optical coherence tomography (OCT) images of the optic nerve head (ONH) were acquired at the normal state and after acute IOP elevation. The IOP-induced deformation of the ONH was obtained from the OCT volumes using a three-dimensional tracking algorithm and fed into the VFM to extract the biomechanical properties of the prelamina and the LC in vivo. Statistical measurements and P values from the Mann-Whitney-Wilcoxon tests were reported. Results:The average shear moduli of the prelamina and the LC were 64.2 ± 36.1 kPa and 73.1 ± 46.9 kPa, respectively. The shear moduli of the prelamina of healthy subjects were significantly lower than those of the OHT subjects. Comparisons between healthy and glaucoma subjects could not be made robustly due to a small sample size. Conclusions:We have developed a methodology to assess the biomechanical properties of human ONH tissues in vivo and provide preliminary comparisons in healthy and OHT subjects. Our proposed methodology may be of interest for glaucoma management.
journal_name
Invest Ophthalmol Vis Scijournal_title
Investigative ophthalmology & visual scienceauthors
Zhang L,Beotra MR,Baskaran M,Tun TA,Wang X,Perera SA,Strouthidis NG,Aung T,Boote C,Girard MJAdoi
10.1167/iovs.61.3.27subject
Has Abstractpub_date
2020-03-09 00:00:00pages
27issue
3eissn
0146-0404issn
1552-5783pii
2763330journal_volume
61pub_type
杂志文章abstract：PURPOSE:To determine whether cultured retinal pigment epithelial (RPE) cells implanted in the subconjunctival space induce an immune response against autoantigens and whether an active downregulation is achieved by RPE grafts placed in the anterior chamber and within the subretinal space. METHODS:Cultured RPE cells fr...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：
更新日期：1997-07-01 00:00:00
abstract：:Neuropeptide Y (NPY) is a recently discovered, amidated 36 amino acid residue neuropeptide present in many but not all sympathetic noradrenergic neurons. In the guinea-pig eye, NPY immunoreactive fibers were found to have the same distribution as noradrenergic fibers except that there were fewer at the iris dilator, i...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：
更新日期：1984-10-01 00:00:00
abstract：PURPOSE:To describe and interpret "choroidal caverns," an unreported optical coherence tomography (OCT) finding in the choroid of patients with geographic atrophy (GA) secondary to atrophic AMD. METHODS:Retrospective analysis of patients with GA. Main outcomes measures included estimation of the prevalence of choroida...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：10.1167/iovs.16-19083
更新日期：2016-05-01 00:00:00
abstract：PURPOSE:Pterygia are common, frequently recurring ocular surface lesions characterized by tissue remodeling, cellular proliferation, angiogenesis, and inflammation. The increased incidence of pterygia in persons exposed to excessive solar radiation suggests that ultraviolet (UV) light may play a critical role in the pa...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：10.1167/iovs.03-0356
更新日期：2003-11-01 00:00:00
abstract：PURPOSE:To identify major gangliosides - the sialated glycolipids - of corneal epithelium; to determine which specific gangliosides, if any, are synthesized in a higher amount or are downregulated during corneal epithelial cell migration; and to determine what role, if any, they play in the modulation of corneal epithe...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：
更新日期：1996-03-01 00:00:00
abstract：PURPOSE:The prevalence of myopia shows a decline with age in cross-sectional studies. This pattern may represent an increase in the prevalence of myopia in younger generations, possibly through increased exposure to near work, or an intrinsic age-related decline in myopia prevalence. Data were analyzed from published s...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：
更新日期：2000-07-01 00:00:00
abstract：PURPOSE:StarGen is an equine infectious anemia virus (EIAV)-based lentiviral vector that expresses the photoreceptor-specific adenosine triphosphate (ATP)-binding cassette transporter (ABCA4) protein that is mutated in Stargardt disease (STGD1), a juvenile macular dystrophy. EIAV vectors are able to efficiently transdu...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：10.1167/iovs.13-11871
更新日期：2013-06-12 00:00:00
abstract：:A detailed comparison of intracellular pH (pHi) regulatory mechanisms was made between fresh (FBCE) and cultured (CBCE) bovine corneal endothelium to: (1) identify the ion transport mechanisms that could directly or indirectly affect transendothelial HCO3- transport; and (2) determine if cultured cells could serve as ...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：
更新日期：1992-10-01 00:00:00
abstract：PURPOSE:To investigate whether polymorphisms in the gene encoding the chemokine receptor CX3CR1, which has been linked to changes in functional ligand-binding activity, are associated with retinal vasculitis (RV) in a cohort of patients in the United Kingdom. METHODS:DNA was prepared from whole blood of 126 patients w...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：10.1167/iovs.05-1631
更新日期：2006-07-01 00:00:00
abstract：PURPOSE:To determine the metrics of vertical saccades in elderly subjects for comparison in neurologic disease. METHODS:Sixteen elderly subjects, ten middle-aged subjects, and thirteen young subjects were examined using a magnetic search coil technique. Saccades were measured to predictable vertical target steps and m...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：
更新日期：1993-07-01 00:00:00
abstract：Purpose:There is strong evidence that abnormalities in corneal biomechanical play a causal role in corneal ectasias, such as keratoconus. Additionally, corneal crosslinking (CXL) treatment, which halts progression of keratoconus, directly appeals to corneal biomechanics. However, existing methods of corneal biomechanic...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：10.1167/iovs.18-25535
更新日期：2019-01-02 00:00:00
abstract：PURPOSE:Recent studies suggest that photoreceptor cells regulate local inflammation in the retina in diabetes. The purpose of this study was to determine if photoreceptor cells themselves produce inflammatory proteins in diabetes and if soluble factors released by photoreceptors in elevated glucose induce inflammatory ...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：10.1167/iovs.16-19859
更新日期：2016-08-01 00:00:00
abstract：Purpose:To compare blood pressure and urine albumin-creatinine ratio over time for participants receiving aflibercept, bevacizumab, or ranibizumab. Methods:Preplanned secondary analyses from a randomized trial comparing aflibercept, bevacizumab, and ranibizumab for diabetic macular edema (DME). The Diabetic Retinopath...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章,随机对照试验
doi：10.1167/iovs.17-22853
更新日期：2018-03-01 00:00:00
abstract：PURPOSE:To develop a new test of activities of daily living (ADLs) appropriate for the low-vision population: the Melbourne Low-Vision ADL Index (MLVAI). METHODS:The MLVAI was designed as a desk-based clinical assessment, comprising 18 observed items on complex ADLs in part (a) and 9 questions on broad self-care ADLs ...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：
更新日期：2001-05-01 00:00:00
abstract：PURPOSE:We compared the anti-fibrotic effects of single versus multiple postoperative injections of saratin following glaucoma filtration surgery (GFS) in the rabbit model. METHODS:The experiment was in two parts. To determine the optimal frequency for postoperative therapy, seven New Zealand White (NZW) rabbits recei...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：10.1167/iovs.12-10120
更新日期：2012-11-19 00:00:00
abstract：PURPOSE:To investigate the role of anti-vascular endothelial growth factor (VEGF)-C therapy in corneal graft survival and concomitant suppression of hem- and lymph-angiogenesis. METHODS:Corneal suture model in BALB/c mice was placed and immunohistochemical staining was performed with CD31/PECAM-1 and LYVE-1 to quantif...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：10.1167/iovs.11-8668
更新日期：2012-03-09 00:00:00
abstract：PURPOSE:Sildenafil (Viagra; Pfizer, New York, NY), a selective phosphodiesterase type-5 (PDE5) inhibitor, is widely used to treat impotence by improving penile blood flow via elevation of cGMP. However, its effect on ocular circulation is controversial and whether retinal arterioles are responsive to this drug remains ...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：10.1167/iovs.07-1208
更新日期：2008-02-01 00:00:00
abstract：PURPOSE:Growth factors act through high-affinity cell surface receptors expressed by target cells and are critical modulators of cell function. Because aqueous humor is known to contain growth factors, these molecules may play a key role in maintaining the normal function of the human trabecular meshwork (HTM). Alterna...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：
更新日期：1999-01-01 00:00:00
abstract：:Bovine corneal endothelial (BCE) cells in culture demonstrated 86Rb+ uptake which was mostly ouabain-sensitive with some (15 to 50%) ouabain-insensitive uptake that was dependent on the presence of bicarbonate in the incubation medium. Bovine smooth muscle (SM) cells demonstrated ouabain-sensitive 86Rb+ uptake but the...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：
更新日期：1989-04-01 00:00:00
abstract：PURPOSE:To provide a clinical and genetic description of a patient cohort with Stargardt disease (STGD1) with identifiable foveal sparing. METHODS:Patients with retinal atrophy (defined as an absence of autofluorescence) that surrounded the fovea by at least 180° and did not include the fovea were defined as having fo...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：10.1167/iovs.13-13825
更新日期：2014-10-16 00:00:00
abstract：PURPOSE:To establish mouse models for RPGR-associated diseases by generating and characterizing an Rpgr mutation (in-frame deletion of exon 4) in two different genetic backgrounds (BL/6 and BALB/c). METHODS:Gene targeting in embryonic stem (ES) cells was performed to introduce a in-frame deletion of exon 4 in the Rpgr...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：10.1167/iovs.08-2742
更新日期：2010-02-01 00:00:00
abstract：PURPOSE:To characterize a new nontransfected, spontaneously immortalized epithelial cell line from normal human conjunctiva (IOBA-NHC), both morphologically and functionally, to determine whether the differentiated phenotype of conjunctival epithelial cells is preserved. METHODS:Outgrowing cells from explanted conjunc...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：10.1167/iovs.03-0560
更新日期：2003-10-01 00:00:00
abstract：PURPOSE:To characterize the response of cultured human retinal pigment epithelial (RPE) cells to lowered environmental oxygen. METHODS:The response of cultured RPE cells to lowered oxygen environments was compared to that of cell types of presumed high (Madin-Darby canine kidney [MDCK] cells, an epithelial cell line) ...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：
更新日期：1994-05-01 00:00:00
abstract：:Visual fixation of a small, stationary target was measured in 12 young observers (mean age = 22 yr) and in 12 older observers (mean age = 70 yr). The two groups' fixation behavior did not differ on various dimensions of fixation stability: mean fixation area, intra-subject variability, or changes in fixation over succ...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：
更新日期：1986-12-01 00:00:00
abstract：PURPOSE:To evaluate the physiological characteristics of the macula in patients with Vogt-Koyanagi-Harada disease during the convalescent stage with specific reference to the kinetics of foveal cone photopigment regeneration. METHODS:Six eyes of three patients at the convalescent stage of Vogt-Koyanagi-Harada disease ...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：10.1167/iovs.03-0381
更新日期：2004-01-01 00:00:00
abstract：PURPOSE:High concentrations of unconjugated bilirubin are neurotoxic and cause brain damage in newborn infants. However, the exact level of bilirubin that may be neurotoxic in a given infant is unknown. The aim of this study was to use a quantitative measure of neural activity, the swept parameter visual evoked potenti...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：10.1167/iovs.14-14261
更新日期：2014-09-02 00:00:00
abstract：PURPOSE:To identify matrix metalloproteinases (MMPs) released by ciliary smooth muscle cells in vitro and to determine whether MMP release is altered by exposure to prostaglandins (PGs). METHODS:Human ciliary smooth muscle cells were grown to confluence in monolayer cultures and treated with PGF2 alpha, 11-deoxy-PGE1,...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：
更新日期：1997-12-01 00:00:00
abstract：:Monoclonal antibody to HSV glycoprotein D was derivatized with palmitic acid and incorporated into liposomes. These immunoliposomes bound specifically to intact mouse corneas infected with HSV-1 in vitro. Furthermore, in yield reduction assays, anti-gD immunoliposomes loaded with acyclovir proved far more effective at...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：
更新日期：1987-03-01 00:00:00
abstract：:Various noninvasive test procedures were used to evaluate retinal function in a patient who had become night blind following vincristine chemotherapy. The results obtained were strikingly similar to those reported previously in subjects with recessively inherited stationary night blindness; the dark-adaptation curve w...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：
更新日期：1984-07-01 00:00:00
abstract：PURPOSE:To determine the disease course of retinal dystrophy caused by recessive variants in the DRAM2 (damage-regulated autophagy modulator 2) gene. METHODS:Sixteen individuals with DRAM2-retinopathy were examined (six families; age range, 19-56 years, includes one pre-symptomatic case). The change in visual acuity o...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：10.1167/iovs.15-17604
更新日期：2015-12-01 00:00:00
